Datasheet LTC2381-16 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | 16-Bit, 250ksps, Low Power SAR ADC with Serial Interface |
| Páginas / Página | 26 / 1 — FEATURES. DESCRIPTION. 250ksps Throughput Rate. ±2LSB INL (Max). … |
| Formato / tamaño de archivo | PDF / 2.1 Mb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. 250ksps Throughput Rate. ±2LSB INL (Max). Guaranteed 16-Bit No Missing Codes
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Versión de texto del documento
LTC2381-16 16-Bit, 250ksps, Low Power SAR ADC with Serial Interface
FEATURES DESCRIPTION
n
250ksps Throughput Rate
The LTC®2381-16 is a low noise, low power, high speed n
±2LSB INL (Max)
16-bit successive approximation register (SAR) ADC. n
Guaranteed 16-Bit No Missing Codes
Operating from a 2.5V supply, the LTC2381-16 has a n
Low Power: 3.25mW at 250ksps, 13µW at 1ksps
±2.5V fully differential input range. The LTC2381-16 n
92dB SNR (Typ) at fIN = 20kHz
consumes only 3.25mW and achieves ±2LSB INL max, n
Extended Acquisition Time of 3.25µs Allows Use of
no missing codes at 16-bits and 92dB SNR.
Lower Power Drivers
The LTC2381-16 has a high speed SPI-compatible serial n Guaranteed Operation to 125°C interface that supports 1.8V, 2.5V, 3.3V and 5V logic n 2.5V Supply while also featuring a daisy-chain mode. The fast 250ksps n Fully Differential Input Range ±2.5V throughput with no cycle latency makes the LTC2381-16 n External 2.5V Reference Input ideally suited for a wide variety of high speed applica tions. n No Pipeline Delay, No Cycle Latency An internal oscillator sets the conversion time, easing exter- n 1.8V to 5V I/O Voltages nal timing considerations. The LTC2381-16 automatically n SPI-Compatible Serial I/O with Daisy-Chain Mode powers down between conversions, lead ing to reduced n Internal Conversion Clock power dissipation that scales with the sampling rate. n 16-Pin MSOP and 4mm × 3mm DFN Packages The LTC2381-16 features a proprietary sampling archi-
APPLICATIONS
tecture that enables the ADC to begin acquiring the next n sample during the current conversion. The resulting Medical Imaging n extended acquisition time of 3.25µs allows the use of High Speed Data Acquisition n extremely low power ADC drivers. Portable or Compact Instrumentation n Industrial Process Control n Low Power Battery-Operated Instrumentation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n ATE
TYPICAL APPLICATION 32k Point FFT fS = 250ksps, fIN = 20kHz
2.5V 1.8V TO 5V 0 SNR = 91.8dB –20 THD = –106dB 10µF 0.1µF SINAD = 91.6dB ANALOG INPUT –40 SFDR = 107dB 0V TO 2.5V –60 50Ω 100Ω VDD OVDD CHAIN IN+ RDL/SDI –80 LT6350 SDO 3300pF LTC2381-16 SCK –100 IN– BUSY SAMPLE CLOCK 50Ω 100Ω REF GND CNV AMPLITUDE (dBFS) –120 2.5V 238116 TA01 –140 SINGLE-ENDED- TO-DIFFERENTIAL 47µF –160 DRIVER (X5R, 0805 SIZE) –180 0 25 50 75 100 125 FREQUENCY (kHz) 238116 TA02a 238116fa For more information www.linear.com/LTC2381-16 1
FEATURES DESCRIPTION
n
250ksps Throughput Rate
The LTC®2381-16 is a low noise, low power, high speed n
±2LSB INL (Max)
16-bit successive approximation register (SAR) ADC. n
Guaranteed 16-Bit No Missing Codes
Operating from a 2.5V supply, the LTC2381-16 has a n
Low Power: 3.25mW at 250ksps, 13µW at 1ksps
±2.5V fully differential input range. The LTC2381-16 n
92dB SNR (Typ) at fIN = 20kHz
consumes only 3.25mW and achieves ±2LSB INL max, n
Extended Acquisition Time of 3.25µs Allows Use of
no missing codes at 16-bits and 92dB SNR.
Lower Power Drivers
The LTC2381-16 has a high speed SPI-compatible serial n Guaranteed Operation to 125°C interface that supports 1.8V, 2.5V, 3.3V and 5V logic n 2.5V Supply while also featuring a daisy-chain mode. The fast 250ksps n Fully Differential Input Range ±2.5V throughput with no cycle latency makes the LTC2381-16 n External 2.5V Reference Input ideally suited for a wide variety of high speed applica tions. n No Pipeline Delay, No Cycle Latency An internal oscillator sets the conversion time, easing exter- n 1.8V to 5V I/O Voltages nal timing considerations. The LTC2381-16 automatically n SPI-Compatible Serial I/O with Daisy-Chain Mode powers down between conversions, lead ing to reduced n Internal Conversion Clock power dissipation that scales with the sampling rate. n 16-Pin MSOP and 4mm × 3mm DFN Packages The LTC2381-16 features a proprietary sampling archi-
APPLICATIONS
tecture that enables the ADC to begin acquiring the next n sample during the current conversion. The resulting Medical Imaging n extended acquisition time of 3.25µs allows the use of High Speed Data Acquisition n extremely low power ADC drivers. Portable or Compact Instrumentation n Industrial Process Control n Low Power Battery-Operated Instrumentation L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n ATE
TYPICAL APPLICATION 32k Point FFT fS = 250ksps, fIN = 20kHz
2.5V 1.8V TO 5V 0 SNR = 91.8dB –20 THD = –106dB 10µF 0.1µF SINAD = 91.6dB ANALOG INPUT –40 SFDR = 107dB 0V TO 2.5V –60 50Ω 100Ω VDD OVDD CHAIN IN+ RDL/SDI –80 LT6350 SDO 3300pF LTC2381-16 SCK –100 IN– BUSY SAMPLE CLOCK 50Ω 100Ω REF GND CNV AMPLITUDE (dBFS) –120 2.5V 238116 TA01 –140 SINGLE-ENDED- TO-DIFFERENTIAL 47µF –160 DRIVER (X5R, 0805 SIZE) –180 0 25 50 75 100 125 FREQUENCY (kHz) 238116 TA02a 238116fa For more information www.linear.com/LTC2381-16 1